Samsung SDI has agreed to supply electric auto startup Lucid Motors with lithium-ion batteries that the two companies say outperform what’s currently available in the marketplace. The joint deal, the terms of which were not disclosed, follows Lucid Motors’s announcement that it will build a $700 million factory in Casa Grande, Ariz. employing up to 2,000 workers. The factory will begin producing 1,000 horsepower cars in 2018 and at least one variant will be able to travel 400 miles on a single charge, Lucid Motors chief technology officer Peter Rawlinson has said.